SAS/SPECTRAVIEW Software User's Guide

Probing an Image for a Specific Response Value

A useful customization option is to explore an image for specific response values, referred to as probing. Probing allows you to pinpoint the actual response value for a specific data point. To probe an image:

Select the [Xform] global button, then [Probe].
Position the cursor in the appropriate window, press the left mouse button to display the probe lines, and do one of the following:
- To probe a Volume window image, place the cursor on an axis and drag the probe line to an appropriate point along the axis. Then drag the other axis probe lines to display the response value at the intersection of all three probe lines.
- To probe a three-dimensional image in a surface window, drag the probe lines along the variable axes to display the response value at the intersection of the two probe lines. (The response axis cannot be used to probe for response values.) The value for the horizontal axis is shown below the axis, and the response value is shown above it.
- To probe a two-dimensional image in a surface window, drag the cursor along the horizontal axis. The value for the horizontal axis is shown below the axis, and the response value is shown above it.
Note that if the data point being probed is a missing value, the software displays a ? for the value.
By default the probe lines and displayed response value are black.
- To specify a different color for the displayed response value, select [Palette], then [Label].
- To specify a different color for the probe lines, select [Palette], [Bounding box], then [User-defined].
Adjust the RGB sliders. As you move the sliders, the specified color appears in the square at the left, and the item changes color in the Volume window. You can also select a color chip, located below the RGB sliders.

Probed Solid-Volume Image Displaying Response Value

[IMAGE]

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